Causes and effects of corrosion in plastic IC packages

As package sizes are reduced the barrier to the ingress of materials that c an cause corrosion are also reduced. This feature offers a unique perspecti ve on the problems of corrosion when the special requirements of the milita ry (US Navy) systems are part of the long term reliability equation. The ph ysical view of the problem is provided by means of acoustic imaging, As pac kages continue to shrink, with boards and packages converging the potential for the effects of corrosion remain an important consideration for designe rs at all levels.